Re: adding parameters to an Audio Unit
Re: adding parameters to an Audio Unit
- Subject: Re: adding parameters to an Audio Unit
- From: Jankoen de Haan <email@hidden>
- Date: Tue, 4 Mar 2008 11:42:56 +0100
Hi Bill
Indeed I'm adding a parameter at the lists, but it has an ID which is
(if sorted numerically) somewhere in the middle of the list.
I was hoping that Logic would map the automation data uniquely to the
parameter id, and did not use indexes. For now I removed the parameter
from the parameter lists known to Logic and only store it in the bulk
(Restore/SaveState).
I use OSType as parameter IDs for a little more easy debugging. This
will get stored and sorted in the AUElemety::mParameters which is an
std::map. Probably that is why the indexing goes wrong by Logic. I
might want to set mUseIndexedParameters to true, so the parameters are
added by index, not by ParmaterID ?
I would like to file a bug report about this issue, but I'm unsure
where to do that. Maybe somebody can point me to the right direction.
JK
I don't think that is the problem.
Once you have published a parameter ID you really have to keep that
ID - you can't change it as it will break all existing uses of your
AU that are stored in presets and documents.
But, I don't think that is what he is doing, I think he is adding to
the end - appending - or at least that is what i had assumed.
If however, you are adding the parameter ID into the middle of the
list, then you need to change this in the AU and append it
Sorry if I am causing confusion!
Bill
On Feb 29, 2008, at 1:54 PM, Stefan Gretscher wrote:
Hi Jankoen,
sorry for the late reply, I was out of the office.
I looked into the issue you've reported and I assume that you've
triggered a bug in Logic by inserting the new parameter somewhere
in your exported parameter list instead of appending it at the end.
Due to legacy reasons, Logic relies on the order of parameters when
storing its automation data. Please file a bug report about that.
Thank you,
Stefan
Am 21.02.2008 um 20:01 schrieb William Stewart:
From the sounds of it, what you have done is fine and seems to
have triggered a bug in Logic; adding parameters should be
supported by the hosts as long as the existing parameter IDs are
kept the same. We'll need to wait and see what the Logic guys have
to say
Bill
On Feb 21, 2008, at 4:19 AM, Jankoen de Haan wrote:
Hi
I'm creating a newer version of my Plugin with some new
functionality. This means I did add one extra parameter to the
parameter list. So far so good. All works fine, but now....
When I open an older session (created with a previous version of
my plugin) that contains automation data in Logic, a lot of
automation ramps are mapped to the wrong parameters. All
AudioUnitParameterIDs are the same between the versions, there is
only one parameter new. What is the right way to make sure, when
I add a new parameter to en exisiting audiounit, the automation
in Logic is mapped right ?
thanks,
Jankoen de Haan
Audio Ease BV
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Stefan Gretscher
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